Suddenly ERROR MESSAGES Appear,” can’t access Backup or Temp Folder

Hard to say cause, usually you don't have 3 antivirus programs installed in one machine all running at the same time. Many members use multiple scanners in an "On-Demand" mode.

If they are trials I see no harm in removing and since they are trials at some point you are going to need to buy anyway.

To uninstall Start > Settings > Apps > Scroll down the list of apps installed, left click once on app and then click uninstall.

There are lots of free AV. Defender from MS is free, any there are free versions of Malwarebytes, Bitdefender and the list goes on.

Some AV are deploying "Controlled Access" to files. This is to prevent unauthorized access to files from things like ransomware. Unfortunately there is some set up. Defender and Bitdefender have this capability. When you get error I would look at the event in the event viewer for more detailed information.

Here is the forum tutorial on Controlled Access.

Change Windows Defender Controlled Folder Access Settings - Windows 10

Could also be that you have a disk error or file corruption. You could rename app temp folder (rather than a delete) and the app will likely recreate a New temp folder.

As to Windows 10 and apps, most vendors provide a facility for you to create recovery media. That said Dell likely has all the apps in one form or another available for download. Windows 10 download is free from MS and will reactivate on all licensed machines. You may need a few things from Dell's download page like a "Button" driver to complete the re installation. You will likely find there is a recovery partition on your drive that will reset to device factory default.

If you uninstall apps they will take their quarantine folders with them. If asked say remove everything. Please do not uninstall Defender.

I am a little concerned that they actually found things, especially on a machine you use for business. I would uninstall the lot and then run a full scan with Defender. Yes Defender is part of the OS. Once it is completed I would then use a second scanner like Malwarebytes download from Malwarebytes.com. Navigate right to their site so you don't get a doctored copy.

Again a full scan, not the quick.

Once the AV are removed and the scans run see if this corrects issue.

If it does not correct issue please cause the error to happen and then look in the event viewer for the complete details.

I would hold off on reloading windows from an ISO. If you reload, eventually, then you have to think through the type of reload. There are some resets, one gets rid of files, one that keeps files. There is also the clean install or an inplace repair. I've lumped them all together but they are different and provide different outcomes. Some leave most things intact, others wipe you system clean. Each have their own instructions and there are tutorials for each.

The support group should be able to scan data base and tell you if you have a bad record or have a way to determine.

Again the info in the event viewer should be able to help determine root cause. Sounds like yo can create on demand so I would create error and then open event viewer. There are four logs, likely this error will either be in application log or system log. That in itself might help point to culprit.

If you have another device I would restore the data and then attempt to make a change. If there is a bad record in the backup or temp file the easiest way around would be to create a new backup and new temp file. The support team should be able to walk you through this.

We discussed deleting the AV's... have you done.

Sure if you bought new HDD you could install Windows, then your app and restore its backup. Very doable. Then of course you would have to re-install everything else.

Thanks again.
The data is not corrupted, nor are there any embedded “walkers” (Walking Dead), hidden in the backup data stream. The business data and images folder came from real time, most recent date, iCloud back ups from the Dell PC.
Before I dare touch the Dell, I needed to test the actual data, to see if that was the target of the corruption), as well as to create a running system of 2 computers ( server and remote), that I could use in the office, if the Dellsfix time was dragging out.
I reactivated a previous Win7pro virtual machine (run under Fusion 7pro), installed that in separate Macs., one, set up as server and the other as a remote workstation. I then replaced the existing out of date, data, with my current Dell backup. I also updated the inter related imaging business app ( that’s tied to the data app), with the current folder of images.
I Booted the server, booted the remote, opened the apps, dialed in the servers up Ddresswhen the remote asked for it, and everything worked perfectly as usual, as I’m used to!

(My original Office setup was a Mac mini w/ boot camp - booted as a W7Pro native PC, it RAn THE SERVER, and also wasp used to directly CAPTURE IMAGES to the related imaging app. A 2nd iMac , would be the remote workstation,,running the netwirk version of business apps & imaging app, on a Win7pro VM / inside of Fusion7Pro, while booted in Mac os10.11. They were WiFi and wired LAN’ed , ran 24/7, both could be remotely accessed by Jump Desktop & Splashtop Personal. They worked flawlessly for years, until some Win7 update fried the boot camp drivers, that then needed power button press- crashes to close it, power on to boot it, ( no restart, or option startup, or Recovery Mode, capability),, no USB PERIPHERAL device-keyboard, mouse recognion, that progressed to no wired peripheral recognition,thatprogressed to power on Opting only into a win Cmd Prompt screen (looking for a WinInstall disk,), that later lead to a fried logic board. Apples repair would take too long. That’s why I got the Dell/ Win10, made that the server. It worked fine fine for 5 months, then ONLY the business apps slowly became corrupted -temp Folder and backup folder can’t write to errors , then to not. Allowing data entries to save, then quitting when I’d try to chance to a different screen of business module in its app) hope the history might shed Some insight on the issue.

The dell came with avast, Bitdefender, and another top 5 AV, besides Win defender;clearly All in the too 5 AV apps!
***So all of these running together, might be The cause of the writing, saving,window changing errors. ThatRe now quitting probs, with the business apps only?

** EVENT. VIEWER: Real time recording of the errirs in Event Viewer is #1 on the to do list, next. I’ll publish the logs afterward.
Hopefully this will point us in the right direction....,,,,,

Then , if still nec, I’ll remove the AVs:
1. Must they be removed completely, vs will just shutting them off ( one at a time) accomplish the same as removal?
2. After a particular uninstall does not fix the prob, do I later reinstall from the mfg’s website, it go looking for them at Dell?
3. When that fails to fix: When do I do the complete, “in place”, OS reinstall of THE Dells Win 10?
In place” means that only the OS IS overwritten, so the apps, their data, the confins & prefs, etc., etc., are not touched at all? How is this type of REINSTALL CONFIGURED?

Wish me luck... the thought if this is giving me itchy hives! Thanks, Steve

I would remove AV completely. If you want one you can go to their site and get. Most have free versions.

If uninstalling does fix continue uninstalling others. A lone AV package is not worth your time. Bitdefender is worth $40 CAD at present.

Not sure about Dell inplace repair. The MS inplace repair leaves everything pretty much intact. I won't say it will be 100% as you seem to have a lot of stuff and I know nothing of this business app. It is not a clean install, will something have to be tweaked, likely.

Post back before doing any installs or inplaces.