Jimbo is right. Separate hard disks for different VMs help performance, and SSDs are a whole lot better than mechanical drives. When you set up a new VHD, make sure to pre-allocate as much space...

It has to do with RTC (real time clock) in the BIOS which may be corrupted. Or it may be the CMOS battery on the motherboard (coin cell battery) is acting up. If the former, clearing the CMOS and...