I think this might be a hard drive problem, but I'm not sure.
This is about a Dell Inspiron 570, running 64-bit Windows 7 Home Premium, all updates. The C drive is a 600GB Western Digital WDC WD64 SATA (IDE) with 148GB free.
My daughter uses it (mostly for games) and it is getting very slow (click on things and they might not start, or sometimes the blue circle spins for a couple of minutes before it starts, or it will start OK). It could take quite a while for something to come up. I checked Task Manager, and nothing was taking up more than a few percent of the CPU. I ran Kaspersky on it and it found one threat. After that was gone, it was still slow.
I started suspecting the C hard drive, so I started a ScanDisk/CHKDSK. It got to stage 4 of 5 (verifying file data), and when it got to 22% it started taking a very long time. It took 3 hours or more to get to 25%, then it got faster. It doesn't give any messages about bad sectors or anything.
I tried three other hard disc testing programs, but I couldn't get any of them to work. Defraggler has a testing function, but it got part way and said that it couldn't finish and scheduled a chkdsk /f.
I reran ScanDisc, and the same thing happened - about 5 hours to go from 22% to 25% on stage 4.
The second HD is a Seagate, and when I installed it in 2009, I cloned the C drive to it, with Windows as it was when I bout the computer. I could swap the drives and it might work. Or could I copy the Windows folder from the second HD to the C drive (might could do it in safe mode)?
Could this indicate a hard disc problem? Or software? What should I do?