Question Only two cores working in windows on Athlon x4 750k

May 11, 2019
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So my friend bought the CPU mentioned in the title. All 4 cores are shown in BIOS and Device Manager, but only two are working. CPUz says that the CPU has 2c/2t and score in Cinebench R15 is half of what it should be. Could reinstalling Windows 7 fix the problems.
His specs:
Gigabyte F2A58M-S1
4GB 1600MHz Single Channel RAM
GT 730 2GB GDDR3
500W PSU, dont know which one exactly
 

boju

Titan
Ambassador
Check msconfig before reinstall Windows.

Type msconfig in the start bar. Navigate to Boot > Advanced options > and see if Windows has checked number of processors. If it has been ticked, untick it and reboot. Sometimes Windows can tick this box if there's been a cpu change.