The following things went wrong all at once: Add/Remove Programs has disappeared from the Control Panel (double clicking "appwiz" does not restore it), Com Ports 3 and 4 have disappeared and been replaced by a general Com Port which is causing a hardware conflict and which, after I remove it, gets automatically restored on Windows startup as a newly found piece of hardware. Also, when I attempt to use "Tweak UI" to repair system files, I get the set-up Wizard for Uninstaller 4 demo, which windows does not let me delete. I have never played with the registry. Good Luck. Windows 95 came pre-installed on my PC, to which only I have access. I have been playing with downloaded files-(is this a virus?). At any rate, I have no idea how to re-install Windows 95. My PC is from Packard Bell- is that the brand you"re talking about? I fo have a master CD somewhere but since I don't know what I'm doing I'd like to take it long and bitter if that's possible.