GB Group is among the stocks lifting software and computer services stocks higher on a busy day for the sector.The identity management business said it expects to report profits significantly better than the revised market expectations despite difficult market conditions.Profit before interest, tax and share-based payments for the year ended 31 March 2010 is expected to be approximately £1.2m, unchanged from the year before.Among other software stocks, education IT specialist RM Group is lower despite the announcement of a partnership with contractor Balfour Beatty on a schools project.Logistics software developer Kewill, which said it expects to meet full year market expectations despite cautious spending and slower sales, is flat, as is Sage Group, which confirmed that its chief executive, Paul Walker, has announced his intention to stand down after 16 years at the helm of the accountancy software company.Top performing sectors so far todayTobacco 25,964.09 +0.51%Fixed Line Telecommunications 1,948.92 +0.45%Software & Computer Services 669.25 +0.18%Bottom performing sectors so far todayIndustrial Metals & Mining 6,899.61 -1.58%Real Estate Investment & Services 1,575.06 -1.36%Industrial Engineering 4,675.02 -1.32%Life Insurance 3,805.88 -1.28%Mobile Telecommunications 3,468.64 -1.27%