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#11
Excep the adapter of course.. :)
How about run msconfig and in the service tab, hide all MS services then disable the rest. Also, disable the startup items, reboot your PC.
Have you updated Firefox 33 and Flash Player ? And to isolate the problem, you might want to download: ShellExView - Shell Extension Manager For Windows and disable all non MS extensions, it might seem irrelevant but sometimes the shell extensions can create lagging problem. Also, any add-ons that you might have installed in the browser.
Have you tried moving the mouse closer to your computer? Is the usb transceiver in the back or front? If in the back try moving it to the front. I find interference is a common problem with wireless mice, particularly in the 2.4Ghz range (one reason I use 5Ghz networking, and don't use cordless phones or other 2.4Ghz spectrum devices).
Chuck... when the mouse lags are you seeing any HDD activity ? You may just be a bit low on resources for everything to keep up. Does task manager show any high CPU/Disk usage when the mouse lags.