Problem booting windows 7

[iwas]

So i upgraded my pc 1 month ago and everythin was fine untill now. So this morning i ran my pc and i came across a black screen asking if i should boot normally or with system recovery. I clicked on normally and it booted as start up repair mode! Anyway after the test it said instructions 0x###### at 0xffffff could not be read and asked wether it should terminate the thing. And i clicked ok and after this it restarted the pc and i had the same problem but this time the error code was different except the code 0xffffff was still the same please help!


ASAP

Note that the error code always changes but is always from the same place 0xfffff!

 

[kenrivers]

Can you boot into Safe Mode? You do this by pressing F8 while the computer is booting. If you can boot into Safe Mode you can try the suggestions listed in this link: http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_install/errors-causing-random-reboots-bccode-50-and-bccode/65512425-075c-4602-a173-75fcc4399435
While in Safe Mode you can run sfc /scannow from a command prompt. SFC=System File Checker.
You can also look at http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/the-instruction-at-0x-referenced-memory-at-0x-the/d19e24a7-b93f-4317-b7a0-829deeb3cd12?msgId=58c31283-21d9-4113-aac5-1f133e2a408a for other suggestions.