But I think it may be your network. I just downloaded & installed Flash player, Shockwave player, & Acrobat Reader 7 over DSL with no problems.
What kind of connection do you have? Is the equipment new? Is the infrastructure new? If you are wireless, is there a possible interference source close by (air conditioner, power substation, generator etc.)? Try using the same equipment from a different network port.
It's also possible there was a heavy load on Adobe.com at that time.
Just a tip here. Get yourself a mid-size USB HDD and copy the install files for the software you install most often onto it. Then you will not have to download for each new job, just connect your hard drive, install, and make sure the software updates after you install. When you notice a new version, copy it onto your install drive.
For example, I have a 20 GB drive with the install files for OpenOffice, Firefox, Thunderbird, Acrobat Reader, multimedia support (Flash, Shockwave, Irfanview, Media Player Classic, etc), anti-virus & anti-spyware (AVG, Spybot, SpywareBlaster, etc.), display drivers, printer drivers, and so on. So far, I've used less than 5 GB.