Back when I was running a folding@home client, could put up an impressive number for 3 PC's, over 5 months w/out updating! Had to quit, the electric bill got too high with the A/C also running hard.
No need to update an OS that's used for nothing else, may trigger a system reboot requirement, defeating the purpose of a 24/7 folding client & possibly corrupting an ongoing work unit. If truly needed, best to wait until the WU is complete & pause the client. These runs on LInux Mint much better than W7, more WU's completed, more points per day or PPD. To this day, am still inside of the top 20,000 donors & mighty close to 19,000. Took a lot of work, both the CPU & GPU were folding separate WU's at 90% usage, if I had the hardware I now have, would had been more, these were on GDDR3 GPU's.
Though the power went out for half a day, and so did the battery of my UPS in 15-20 minutes. For now though.......
cat@cat-ASRockPro3 ~ $ uptime -p
up 3 hours, 49 minutes
cat@cat-ASRockPro3 ~ $