I know of a common easy thing that can help, but it requires the CD. Here's the link about it.
Is this machine worth saving? (that is, getting your XP CD?)
I have an Emachines running XP version 5.1.2600 and as of yesterday it does a constant restart loop and wont boot up. It gets to the windows loading screen blips black and restarts. I am unable to start in safe mode or any other option eg: safe mode with networking etc.
I have not installed any new software and only noticed this happening as of yesterday morning and the computer was fine most of the day until last night when it wouldn't boot at all and just does the continuous restart.
When I start in safe mode and it loads drivers it stops on "drivers agpCPQ.54" or S4 cant remember. Then goes into restart loop.
When I hit F8 and get the start menu and select automatic restart disable it gives me a stop: 0x000000F4 (0x00000003, 0x84AC96E8, 0x84AC985C, 0x805C86BC).
I do not have an XP os disk.