HelpPLZ SOMEONE HELP ME :(

Recently my computer give me this error all the time (BlueScreen)

Here it is the description of the error :

Signature of problem:
Problem Event Name: BlueScreen
Versão do SO: 6.1.7601.2.1.0.256.1
ID de Região: 2070

Additional information about the problem:
BCCode: 50
BCP1: FFFFF8A00A708000
BCP2: 0000000000000000
BCP3: FFFFF80002A87630
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\060313-18500-01.dmp
C:\Users\Manuel\AppData\Local\Temp\WER-66515-0.sysdata.xml

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If someone can help me solving this plz reply the thread.
Tanks in adavance

maybe a virus? sis u sone a scan?