To get into Safe Mode you need to press the F8 key after the system has run through the POST sequence but before it starts to load Windows.
If you have a Logo on the Screen when it initially boots go into BIOS and turn it off and then save changes & exit on the reboot after the Memory Test has been completed press & hold down the F8 key until you hear a constant beep from the internal speaker then you can release the F8 key and wait for the system to go to the Start Up Menu.
However if you didn't OK the changes you should have had the system drop back to the previous settings after a few seconds and I don't think that making any screen resolution changes in Safe Mode will cure your problem as the Video Drivers are not loaded when you are running in Safe Mode you are running on the default Video Drivers and any changes that you make there will not be reflected when running in [b]Normal Mode.[/b]
If you are unable to read anything on the monitor your best bet is to do an In Place Install by following the directions here
http://tinyurl.com/g4bv8
But you'll need access to the Restore/OEM Windows CD or the Hidden Partition which holds the install program depending on who made the system. It will also require every Hot Patch and Service Pack that has been released since your copy of Windows was released to be reinstalled but it will not affect any already installed programs or data.
Col
