Windows help
Windows Defender issues | Windows help
Defender fails or blocks files.
Defender fails or blocks files. This guide walks you through common fixes step by step. If it does not work or you prefer professional help, Leftclick AG in the Basel region is here for you.
Step by step
- 1
Updates
Update security definitions.
- 2
Service
Check Windows Security Center services.
- 3
Exclusion
Legitimate business software exclusion only with IT.
- 4
Third party
Avoid two antivirus products at once.
When DIY is not enough
If these steps do not help, you are unsure, or several devices in your business are affected, Leftclick AG can take over troubleshooting. We work via remote support or on-site in the Basel region and find the root cause without guesswork.
FAQ
- Is the initial consultation free?
- We briefly clarify the issue by phone and honestly tell you whether a DIY fix is enough or professional help makes sense.
- Do you support business PCs too?
- Yes. We support SMEs in Basel-Stadt and Basel-Land with managed IT, support and security from a single team.