Early 2011 MBP Disk Issues

2.2ghz sandy bridge/750gb/8gb

running sluggish, beachballs, , required booted install disk (twice.) both times error:

"invalid volume free block count, 131520055 instead of 131520054."

twice repaired. "safe & sound" reasoning says should wipe , clean install.

suggestions or work-arounds?

 

a clean install best option @ point.

 

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