a video card problem. Try reseating the vid card, changing the resolution to the native one for the screen, and put it on the right refresh rate.
First, I apologize for not better researching this thread first by searching the forums, but I am unable to do much on my system due to this incessant flashing screen that is on for about 1 second then goes off for about 2 seconds then back on and off etc. So everything I do is like a dotted line so to speak; the screen is not on long enough to easily position the cursor, and it takes a lot longer to read or write anything because the best you can do is a few words at a time once your eye finds the place where it last left off.
I have done everything I can think of with respect to anti-virus, spam etc. and also having done a fresh install of Windows XP and SP2 with all upgrades, as well as all other programs on the system. My connection to the internet is via a T1 cable DSL modem.
I installed a brand new Asus M2A-VM motherboard with AMD 64+ Dual Core processor, 2 Gb DDR2 800 Mhz PC6400 SDRAM (twin 2 x 1 Gb), new 450 watt power supply, new 500 Gb SATA2 HDD all within the last 30 days. Display is a 2 month old Dell 20" flat screen LCD with built-in webcam and audio. Utilized existing case, DVD-+RW, 3.5" FDD, printer, and flat bed scanner. The wireless keyboard and mouse are both 6 months old.
I hope the foregoing provides sufficient information regarding my system configuration.
Please rescue this frustrated user. Any help or suggestions would be appreciated. Thanks in advance...