Hello Avner,
Welcome to Microsoft Community forum.
I would suggest you to try the following methods:
Method 1:
Open the Windows Update troubleshooterhttp://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter
Method 2:
I would suggest you to check if you are able to access Windows Update service and also make sure that the following services are started. If it is not started follow these steps:
Step 1:
a. Click on Start, type "services.msc" (without quotes) in start search box and press
Enter.
b. Locate Windows Update service.
c. Right click on the Windows Update service and select Properties.
d. In Start-up type, select Enable.
e. Click Start under Service status.
f. Click OK.
g. Repeat the steps c to f for the following services also:
Background Intelligent Transfer Service & Cryptographic Service.
If the steps do not help resolve the issue, then you may proceed with the methods mentioned below and check.
Step 2: Step by step instructions to get the issue fixed.
a) Click on “Start” and type “cmd” (without the quotations) in the start search box.
b) When you see the “cmd” icon in the start search list, Right Click on it and select “Run as administrator”.
c) On the open Command Prompt window copy and paste the commands (all at once) –
net stop wuauservnet stop cryptSvc net stop bitsnet stop msiserverren C:\Windows\SoftwareDistribution SoftwareDistribution.oldren C:\Windows\System32\catroot2 catroot2.oldnet start wuauservnet start cryptSvcnet start bitsnet start msiserver
d) Wait for the process to complete.
e) Close the Command Prompt.
After completion of all these steps restart your computer and then try to install the Windows Update.
Hope this would help. If issue still persists post back with current status of your computer and result of the proposed suggestion, we will be happy to assist you.
Thank you.