“Why is this error happening to me?”

"Error -1000" may be caused by damaged files related to the V3 update.

“How can I solve this problem?”

Please follow the steps below to recover damaged files.

1. Go to the 'MUpdate2' folder in the V3 installation path using Windows Explorer. (Default MUpdate2 path: C:\Program Files\AhnLab\V3IS90\MUpdate2\)
2. Run RestoreU.exe (update recovery program) in this folder and wait for 1 to 2 minutes.
   (The window does not appear when running the recovery program.)
   3) After 1~2 minutes, run V3 and check if it is updated normally.

“This guide doesn’t work for me”

If the same error occurs after following the steps above, please refer to the article below and collect Ahnreport, and we will check and respond.
[How to collect Ahnreport including debug logs]