upgrading problems

[Victor Vahe Kevorkian]

Reluctantly, yesterday I went ahead and updated Ubuntu 7.10 to Ubuntu 8.04.
After 45 minutes of downloading and 50 minutes of installing, I had problem
with "gcc-3.3-doc" (which I finally deleted it after searching for an hour
for solutions).
Ubuntu 8.04 brought with it Firefox3, which is a welcomed Browser, but lost
all my "add-ons".
The most unfortunate incident was the new VirtualBox-1.6.0-OSE ( which is
not an Innotek property anymore and it belongs to SUN Misrosystems). After 7
hours of figuring out how to install the "tar.bz2" and "vboxusers"
rejections, when I finally saw the OS working came the most disappointing
issue no USB entry, plus I can't connect to my network. VB1.5 was working
like magic before.
I need HELP, but please in very simple language with no abbreviations, I am
68yo and a candidate for a Heart Transplant.
VB 1.6.0-OSE is built in Ubuntu 8.04 with Windows XP Professional.
I appreciate your guidance and I will remain grateful forever. Theses are
the last upgrades I will attempt to perform on my PC.
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