Hi,
some advice:
- make a backup of your important data as soon as possible !!!!!!
- if the errors keep occurring:
-> try RAM-Test-Tools and Harddrive-TestTools, those errors are imho easiest to find for the layman. you might also remove some RAM-Modules, if you have more than one, or shift them around on your board (do this in pairs, if you have older/paired memory modules..)
replace parts (RAM, Grafixcard, harddisk etc..) if you have some spare/older parts (those should be verified to be working on some other PC, of course..)
-monitor the temperature of CPU/System and the fan speed(s); check that the fans are running smoothly
without some diagnosis on your part, I can't advise you more..
-maybe also try a complete fresh reinstall of WIN (of course, backup first!!):
this includes deleting all partitions (e.g. with fdisk) and making new ones:
better split harddisk in
C: System &
D: Daten