FWIW just the other day I had just opened my computer and checked my e-mail and read some forums without issues, meaning the performance was sufficient to those tasks. Then I thought I'd zero my brain by playing some online Mahjong on a familiar site. For some reason the page loaded veeeery slowly, only the symbols on the tiles were showing which was unplayable as the tiles were transparent. Restarting my browser helped a bit but the page still loaded slowly. After all the elements were there the game played smooth as butter. Don't know if the browser was updating in the background or something else, the 300/300 optical fibre connection should be stable as a rock.
Computers are definitely feminine. They can get mad at you for no obvious reason. And kiss and hug you the next moment.