I have written about ways to electronically put your signature on a PDF quite a few times (for example, using PDFPen or in Preview), but they have all been on the Mac. Today it is Windows’ turn.[1]
The latest version of Adobe Reader X has added the ability to drop your signature into a PDF. Previously, you needed the rather-expensive Acrobat X for this. Here is how it works:
Go Into Signature Mode
When you have your PDF loaded, the first thing you want to do is click the Sign button in the upper-right corner of Acrobat Reader.