McAfee, the computer security unit of Intel, is planning to lay off a small number of its work force of around 7,100 employees.

In February last year, Intel acquired McAfee for $7.7bn which had 7,072 employees.

McAfee and its rival Symantec are reportedly finding it difficult with falling PC sales and rising dominance of smartphones and tablets.

The companies may find it more difficult when Microsoft launches its Windows 8 operating software on 26 October this year.

Several companies are planning to tamper their sales expectations over concerns about Windows 8 failing to lift the IT market.

Intel and its rival chipmaker ARM have already decreased their fourth quarter earnings forecasts.

Earlier in September this year, McAfee’s Threats Report for second quarter of 2012 revealed that it has detected a 1.5 million rise in malware since Q1 2012, which the company said highest rise in malware samples identified in the last four years.

McAfee said that its consumer and enterprise security products are set to support Windows Server 2012 and Windows 8, which is Microsoft’s new operating systems scheduled to be launched in October 2012.

According to new research from Gartner, spending on IT security is expected to hit $60bn this year and will rise to $86bn by 2016.