|Those error fixing scans should be spelled SCAMS.|
That's what they are.
You can take care of most things by yourself free of charge with a little preventative maintenance.
Begin by running disk cleanup. You will find it in START> ALL PROGRAMS> ACCESSORIES> SYSTEM TOOLS
In the same place you will find defragmenter. DO that.
If you are running out of space consider deleting any old files or uninstalling programs you no longer need.
You can also reduce the amount of space occupied by your recyclebin. It is typically set at 10% of total drive capacity and on large drives is a ridiculously large amount of space to tie up when regular emptying of recyclebin will see it use only a fraction of that. Rightclick on the recyclebin and select properties to make the adjustment.
There are other cleanup utilities such as CCLEANER SLIM which is regularly recommended by the experts here as a good easy to use cleanup tool. Google for it but make sure you get the SLIM version.
Goin' Fishin' (Some day)