With the Department of Justice and Sun Microsystems Inc both tearing into it, Microsoft Corp is now trying to get little Caldera Inc off its back and has asked a federal court in Salt Lake City to dismiss the anti-competitive charges Caldera has made against it in a private antitrust lawsuit. Specifically Microsoft says there is no factual basis for Caldera’s claims and has filed nine motions for partial summary judgement in the case which is set to begin in June. Microsoft says Caldera is recycling claims that the FTC and DoJ reviewed years ago and decided were groundless. After nearly three more years of investigation, Caldera still has no evidence to support its claims. Microsoft’s summary judgements refute Caldera’s claims that Windows 95 was an illegal tie of MS-DOS and earlier versions of Windows and that it designed Windows 3.1 to be incompatible with Novell Inc’s (now Caldera’s) DR-DOS operating system.