How to fix 0xc00007b error in windows 7 100% working and tested

Open a command prompt as administrator
Type  “net stop wuaserv"

1.       Go to local disk C

2.       Go to Windows folder

3.       Search the SoftwareDistribution

4.       Rename SoftwareDistribution.old

5.   then type in cmd net start wuauserve

6.    Install .Net Framework then restart your unit