The internal fans have most probably become clogged with dust, requiring them to turn faster to try and cool the PC! From your initial call we will advise on whether we feel that we think that a on-site visit would be appropriate, if so we will attend site and spend no more then 2 hours on-site, alternatively you can drop your PC at at our workshop in Crawley, we can also collect it. PC repairs can be very time consuming, downloading drivers, scanning drives and updating. We offer two types of repair, Immediate and scheduled, these can be on-site at your home, business or within our workshop in Bonnetts Lane, Ifield, Crawley, RH11 0NY.