Method 1:
(1) when logging in, a question will be prompted to prevent windows from correctly checking the license of this machine
Error code: 0x80070002
Solution: enter safe mode and find oembios in the installation CD bi_ And expand Exe (under i386 directory) and copy it to the hard disk. For example, under C: run CMD (run DOS command under C: disk: expand oembios. Bi_ oembios. Bin). If there is a problem with decompression, you can use winrar to decompress it. After decompression, you will get an oembios Bin file, copy this file to the installation directory of the system: Windows \ system32 \ and restart it.
Method 2:
(2) when starting Microsoft Windows XP, you may receive the following error message:
A problem prevented windows from accurately checking this computer's license. Error code: 0x80070002‘ After "OK", the system logs off and falls into a dead cycle.
Reason:
This problem occurs if any of the following conditions are met:
• the default security provider in Windows XP has been changed.
• the drive letter of the system drive has changed.
Please reset the default security provider in Windows XP
To reset the default security provider in Windows XP, delete the relevant registry key in the windows registry. To do this, follow the following steps: 1 Start the computer. Press F8 at startup to start the computer in safe mode.
2. Start the registry editor (regedt32. Exe).
3. Delete the following entries from the windows registry:
HKEY_ USERS\. DEFAULT\Software\Microsoft\Cryptography\Providers
HKEY_ USERS\S-1-5-20\Software\Microsoft\Cryptography\Providers
4. Exit the registry editor.
5. Restart the computer.
If it still doesn't work, it is recommended to format disk C with partition software (or enter DOS and use format C: / Q command), and then reinstall the operating system!
Method 3:
I. stop updating service
1. Open "control panel", change the viewing mode to large icon, and then click "management tools".
2. Open "service" in "management tool".
3. Right click the windows update service, and then click stop.
II. Delete temporary documents
1. Enter C: \ windows \ softwaredistribution directory.
2. Open the datastore folder and delete all files and folders in it.
3. If you are prompted that administrator permission is required, click "continue".
4. Go back to the superior directory and delete all files. Similarly, if you need administrator privileges, click "continue".
III. restart the update service
1. According to the method in step 1, find the "Windows Update" service, right-click and select "start".
2. Close all open windows and reinstall windows updates that cannot be installed before. At this time, it can be installed smoothly.