I can fix your computer. Running slow, making noises, doing strange things? An apparent Windows problem can often be caused by hardware issues; perhaps an aging hard drive, faulty monitor or even spilt wine on the keyboard (last resort for some Windows problems, but I recommend drinking it instead of spilling and ringing me for help). Spilt liquid on a keyboard is often terminal for the computer, but not necessarily for all your photos and documents. Even if your computer seems totally dead, and even if you've dropped it in the bath so you have a pretty good idea why it doesn't work... bring it to me and I can usually get your data from it onto a usb stick or external storage of your choice.
Not just PCs either. Whilst not an Apple expert, I can solve some password issues, reset to factory settings with your ipad. Even retrieve lost photos from a damaged memory card.