Microsoft networking seems to get worse

Is it just me or has Microsoft networking got worse over recent weeks.
On my home machine which never gets switched off, I used to be able to use networking functions at any time. In the last couple of months, Outlook refuses to collect mail unless I a) log of and log back on or b) hit the repair function on the network connection.
In the last couple of weeks at home and at work I have had timeouts on displaying web pages which then correctly display when I hit the refresh button.
To explain why I am writing this blog today I will offer an example. At work I have two computers on my desk, one running Vista Business, one running Ubuntu Hardy.
I was trying to access some pages on the Dell website (I won't bore you with why I would do such a foolhardy thing). My Vista machine was up and running. Go to IE (7) and type in www.dell.com. Wait for the first page to display, link to the next page and ...... Nothing. Windows connection display flashing back and forth.
After waiting for a while I decide to take action.
I boot up my Linux machine. I log on. I load Firefox. I type www.dell.com in the address bar. I get the first page displayed. I link to the next page and lo.... It displays BEFORE the Vista machine does. Albeit by only a few seconds but look at what it has done to get there.
Let's just consider the following.
Two machines of similar hardware spec. Both log on the the same domain server. Both use that domain server as the primary DNS server. Both access the internet through the same broadband link. Both accessed the same website pages. What is different. The operating system.
I have not in the past been one of those who knocks Microsoft, my posts on the Ubuntu forum bears witness to that, but why, oh why, with all the resources Microsoft can throw at a problem does the system perform slower and slower. None of the upgrades seem to improve performance. It seems that where we once thought we were wading in the thin sugary syrup, we now seem to be struggling through thick black treacle.
Come on Microsoft get it fixed.