Full Text crawl task permanently writes huge amount of data to disk - slowing down PC

Hi, all!
SQL server full text crawler on my machine permanently reads/writes a lot of data without visible reason. There are no modifications to databases made at the time. And this doesn't stop for 2 days already.
Recently i've noticed that my PC became very unresponsible. When I looked in resource monitor's Disk Activity tab i've found that Disk Queue Length column has value of 3 to 6, wich I think is a reason why computer became slow.
Here is to snapshots for values
Logical Disk Physical Disk  Active Time (%)    Available Space (MB) Total Space (MB)  Disk Queue Length C: D:          0                   81.48                   137 450     ...