Hi gal3156,
Thanks for posting on Microsoft Answers!
You can download these updates as standalone packages and install them.
Download the following update manually from the link below:
Update for Windows 7 (KB974431) for 32 bit editions:
Update for Windows 7 for 64- bit based Systems (KB974431):
An update is available to improve the stability and reliability of Windows 7:
http://support.microsoft.com/kb/974431
Step 2.
Once the download completes close *all* open programs and browsers (including antivirus).
Now try to install the updates
Similar issue was also discussed here:
http://social.answers.microsoft.com/Forums/en-US/vistawu/thread/a2df7d06-be9b-4554-b796-c52fac838842
3.
Follow the articles below for Check Disk issue, it will guide you to run the check disk tool:
http://windows.microsoft.com/en-US/windows7/Check-a-drive-for-errors
4.
For Windows Media Player and DVD issues:
Could you provide us the error messages or the description of the problem while you try to use them?
For CD-DVD issue:
To fix this problem automatically, click the Fix this problem link.
Then, click Run now button from the Automated Troubleshooting Services page and follow the steps in this wizard.
http://support.microsoft.com/kb/314060
You can also follow the rest of steps for Windows 7 in the article above.
Hope it helps.
Thanks and Regards:
Shekhar S - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think.