"Computing Which? magazine visited seven PC World outlets and 13 independent stores. The experts deliberately created faults. On half the computers they deleted a file that helps to start up the Windows operating system. On the other half they loosened a cable connecting the hard disk to the rest of the computer.
The research identified 'staggering' differences in the level of know-how and charges. Correcting the simple Windows software problem triggered price quotes from £20 to £260, while the bill for fixing a loose cable ranged from £10 to £139.
One London branch of PC World misdiagnosed the software problem as a corrupted hard disk and quoted £350 for repairs. A member of staff even advised buying a new PC which could have cost more than £500. Another PC World branch in Oxford misdiagnosed a computer with a loose cable as having a corrupted hard disk and quoted £300 for a repair. "
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