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(32- and 64-bit, PostScript and PCL5 versions available but HP printers use PostScript emulations that don't always work with Adobe apps, earliest LaserJet model supported is 41004000, not 4, 5M, 4050)
Installing the HP Universal Print Driver (HPUPD) has a few side effects. First, it can install two new services on the client computer which are set to load on startup:
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