Laptop unable to use BitLocker on drive with prefetch fragmentation
4.5
Fragmented prefetch data slows down the initial encryption scan.
Symptoms
- Slow app launch
- BitLocker setup lag
- Disk usage 100%
Possible Causes
- Old prefetch entries
- Disk errors
Step-by-Step Fix
1
Clear Prefetch
Delete everything in C:WindowsPrefetch (Windows will recreate it).
2
Run chkdsk
Verify filesystem integrity.
3
Check for Disk Errors
Prefetch is a high-traffic system folder.
When to See a Technician
Clearing prefetch can temporarily slow down app launches, but it fixes fragmentation issues.
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