Yesterday your computer was working fine, today it won't even switch on. Startup problems are actually amongst the most common computer repair issues I come across. Sometimes it's fixed within 30 seconds. Other times it takes a bit longer and you might need some new hardware. I've written lots more about startup issues on my blog.

You could say your computer has a performance issue if it just isn't behaving the way you expect it to. In my experience the most common performance issue is that your computer's running too slowly. There are various reasons why this might happen and I've written about it on my blog. Other performance issues include freezes and shutdowns.

Issues with malware and viruses are all too common. The malware may have entered your computer via an email, or from a website you've visited, or you may even have been hacked as a result of a scam phone call. Fortunately it's usually not that difficult to clean up and secure an infected computer. I can also advise you on how to stay safe in the future.