I have dell 4100 with windows me (I know longer get tech help). When I start up, I receive an "explorer error" message with two options. Close or Ignore. If I press "Ignore", I get the same "Explorer Error" message. If I press "Close", I receive an error message that says "explorer has caused an error to gdi.exe. gdi.exe will now close". This causes the booting to freeze. As a result, I cannot boot to desktop. I decided to reformat the hard drive, but I have a problem. When my computer boots from the boot disk, I received a message that says "Windows ME has detected that drive C does not contain a valid FAT or FAT32 partition. Then it gives me three reason why this might happen. From here, it goes to the A:\>. I typed "a:format c:". Then I received a message that says "format not supported on drive C:...Format terminated. So far I have ran scandisk. This showed no errors. From the "A" prompted I went into fdisk and I have one partition set to "A". So I do not know why drive C does not have a valid FAT or FAT32. I have also booted to "Safe Mode" but I am very limited. I cannot run the cd-rom, I cannot run Nortons Systemworks, and I cannot access the internet. Right now I am on my computer at work. I need something that I can take home. Should I focus on fixing the "Explorer Error" which I think might be a virus or should I focus on trying to reformat the hard drive?...or should I do something else? I would appreciate any help. Thank you.