FIX: Windows Update Gives Error 80070490.

In most cases the downloaded data is just corrupted and removing this data can help making Windows update again.

1. Open Elevated Command Prompt by following one of two methods:
   1. Press the Windows + X at the same time, then choose Command Prompt (admin)
   2. Press the Windows + W key at the same time and then type ” cmd ” right-click
      Command Prompt and choose Run as Administrator
2. Enter the following command: “net stop wuauserv” and hit enter.
3. Enter the following command: “net stop cryptSvc” and hit enter.
4. Enter the following command: “net stop bits” and hit enter.
5. Enter the following command: “net stop msiserver” and hit enter.
6. Enter the following command: “ren C:\Windows\SoftwareDistribution SoftwareDistribution.old” and hit enter.
7. Enter the following command: “ren C:\Windows\System32\catroot2 catroot2.old” and hit enter.
8. Enter the following command: “net start wuauserv” and hit enter.
9. Enter the following command: “net start cryptSvc” and hit enter.
10. Enter the following command: “net start bits” and hit enter.
11. Enter the following command: “net start msiserver” and hit enter.
12. Reboot your system.

Resolving method 2

Executing an SFC scan

1. Open Elevated Command Prompt by following one of two methods:
   1. Press the Windows + X at the same time, then choose Command Prompt (admin)
   2. Press the Windows + W key at the same time and then type ” cmd ” right-click
      Command Prompt and choose Run as Administrator
2. Type the following command ” sfc /scannow ” and hit enter (see image)
3. Wait for the results to come back.

If problems are found that could not be repaired then try to run the DISM scan as explained below, after finishing DISM run the SFC scan again, if the problem still persists then you’ll have to refresh your system.

1. To execute DISM Successfully, Open Elevated Command Prompt by following one of two methods:
   1. Press Windows + X at the same time, then chooses Command Prompt (admin)
   2. Press Windows + W key at the same time and then type ” cmd ” right-click Command Prompt and choose Run as Administrator
2. Then type the following command ” dism.exe  /online /Cleanup-Image /RestoreHealth ” and hit the enter  key(see image)
3. DISM will now start scanning and trying to fix any problems it finds within the image, it’s normal to get stuck at 20% just wait patiently.

If you receive no error’s at all then try to run the Update again, if it fails then continue reading below.

Refresh your system

If the problem stills persist, then there is currently no known fix for this problem, many people could execute the update successfully after refreshing their system and then trying to apply the update again, if you wish to try that then read:

http://windows.microsoft.com/en-IN/windows-8/restore-refresh-reset-pc

Conclusion

We hope you were able to solve Windows Update Error 80070490, if you were not then please comment and we’ll try to help you as best as possible

by Yuri Pustjens