every program crashes

almost all of the programs crash when i launch them
"XXX has stopped working"
it started after i reinstalled graphics card drivers (reinstalled, not installed new ones)
tried reinstalling theese drivers or getting newer/older ones,
if you need more info just tell me what you need
thanks for help

Maybe your RAM is bad.

First thing; complete system specs, OS and bit type, what software - specific names for starters.

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