Does PC have Adobe Reader installed?

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>One of our users goes on the Internet to her provider and downloads reports to her PC.
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>She normally reads them (she says they are in Adobe.... so I'm thinking they used to be PDF files).
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>Since she received a replacment PC from us recently, she now cannot see the reports. They Internet site wants to download to her a ASPX file. Her PC cannot open this... and I downloaded the file to my updatted PC, and all I see is a text file.
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>How can she read this now? Was there something missing on the new PC that the older PC had to handle ASPX? Maybe the older files were also ASPX, not PDF and the older PC could show it with updatted Windows (and .NET files)????
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>Thanks!