My laptop is very slow and I was told the deleted items were still there and were slowing down. Since I don't want to give up the laptop without my presence, how can I do it myself? I'm a computer greenhorn and need a helpful answer.
There are numerous tutorials on the Internet on the subject of "Removing garbage data from your computer" and "Cleaning up the registry" with detailed descriptions and possible tool suggestions.
Do you still have the original Windows recovery disc from the notebook manufacturer for your device? If so, you can reset it to the factory settings if necessary and then only need to update the drivers.
In any case, you should save important personal data on an external data carrier in advance.
You can do a disk cleanup, that often helps. There are well-explained tutorials on Youtube.
In addition, but really only if it has an HDD and no SSD, you can defragment your data carrier. But as I said, only if it is an HDD (mechanical hard drive).
You can also install the CCleaner, which can make your laptop work again.
If none of this helps, Windows will have to be reset or reinstalled. However, private data should first be backed up on an external data carrier or in a cloud.