I see that I won't be the first to post about this problem, but I'm hopeful that if I include sufficient detail, we might be able to get the problem resolved.
Software downloads and installs without issue. Upon opening ArcGIS Explorer, the default base map opens with the navigator displayed in the lower left corner of the screen. Some command ribbon groups and other pieces appear, but not the entire ribbon. If I hover the mouse over the command ribbon area, other pieces appear. If I press the alt key, the entire ribbon appears. However, unless I click one of the icons, the ribbon disappears. If I open one of the tools, portions of it will appear, but then quickly disappear. The same is true for the Find and Contents boxes on the left side of the screen. Most of what appears is functional, i.e. I was able to perform a search and add another layer. The full navigator contols do not appear until I hover the mouse near the bottom left of the screen. When I attempt to click on anything, the zoom, for example, the controls disappear.
I ran the utility to make sure I met all requirements and found that I met not only the minimum reqs but the recommended reqs as well. To be on the safe side, I manually checked all reqs listed on the site. I've posted my laptop's relevant specs below and attached a screen shot to give anyone who's interested an idea of what I'm seeing.
Relevant specs:
Dell XPS 15 (L501X)
Intel Core i5 CPU M 460 @ 2.53 GHz (with an effective rate of 5.6 GHz)
Windows 7 64-bit
Display Adapter: NVIDIA GeForce GT 420M with latest driver
Microsoft .NET Framework 4
MSXML 4.0 SP2
If anyone has resolved this problem, I'd sure appreciate hearing about it.
Thanks in advance!