Recently I did a Windows update. When the update was done, it said to restart your computer. I restarted the computer and kept getting a shdoc401.dll error. I had to change using the explorer.exe to using winfile.exe. I finally got it back to where I can get back into Windows with the desktop. Since this, my computer has not been right. I lost the sound, and when I keep it on for a long time (such as overnight) it will be slow if not locked up when I use it again. It will not shut down on its own or by the button, it has to be unplugged. I have alot of important files and programs on my computer and would rather not reformat. My question is, could I install Windows 98SE over top of Windows 98SE again safely? I have read both ways of yes you can do it safely, and no, to reformat. Has anyone tried this with success and no loss of files? Thanks for any information given.