Why no pictures in my email?

Most emails I get via Thunderbird has nothing but an empty box where the picture should be. (see attached) I say Thunderbird because thats all I have. Other people with Thunderbird do get the picture. Have asked Mozilla for help and it appears to them that the problem is not in Thunderbird.
That leaves my computer. Can anybody tell me what to look for?

Below is some excerpts from Belarc Adviser that may help.

Operating System System Model Windows 7 Ultimate Service Pack 1 (build 7601)
Install Language: English (United States)
System Locale: English (United States)
Installed: 3/26/2014 10:47:13 AM
Boot Mode: BIOS (Secure Boot not supported) ASUSTeK Computer Inc. P53E 1.0
System Serial Number: B8NXAS824696359
Enclosure Type: Notebook Processor a Main Circuit Board b 2.20 gigahertz Intel Core i3-2330M
No memory cache
64-bit ready
Multi-core (2 total)
Hyper-threaded (4 total) Board: ASUSTeK Computer Inc. P53E 1.0
Bus Clock: 100 megahertz
BIOS: American Megatrends Inc. P53E.204 06/27/2011 Drives Memory Modules c,d 1307.58 Gigabytes Usable Hard Drive Capacity
521.73 Gigabytes Hard Drive Free Space

HL-DT-ST DVDRAM GT34N ATA Device [Optical drive]

ST9500423AS [Hard drive] (500.11 GB) -- drive 0, s/n 5WR0RJEE, rev 0002SDM1, SMART Status: Healthy
StoreJet Transcend USB Device [Hard drive] (1000.20 GB) -- drive 1, s/n 363502FE9J813S, SMART Status: Healthy 2988 Megabytes Usable Installed Memory

Slot 'ChannelA-DIMM0' has 4096 MB (serial number 9459685C)
Slot 'ChannelA-DIMM1' is Empty
Slot 'ChannelB-DIMM0' is Empty
Slot 'ChannelB-DIMM1' is Empty

Controllers Display ATA Channel 0 [Controller] (2x)
ATA Channel 1 [Controller] (2x)
Intel(R) 6 Series/C200 Series Chipset Family 2 port Serial ATA Storage Controller - 1C09
Intel(R) 6 Series/C200 Series Chipset Family 4 port Serial ATA Storage Controller - 1C01 Intel(R) HD Graphics 3000 [Display adapter]
Generic PnP Monitor (15.3"vis) Bus Adapters Multimedia Intel(R) 6 Series/C200 Series Chipset Family USB Enhanced Host Controller - 1C26
Intel(R) 6 Series/C200 Series Chipset Family USB Enhanced Host Controller - 1C2D Intel(R) Display Audio
Realtek High Definition Audio

It's a security feature. If you want to over-ride it choose "show remote content"

Also if the domain hosting the image is blocked in your hosts file or security software - the image won't display.

If pictures are supposed to show but don't. I do "show remote content". They show then, sometimes.
The domains are NOT blocked as far as I can tell.

Is it all images in all emails or just some images?

Also is it possible to bypass Thunderbird and sign into your email account via your browser and view images that way?

I'll do this last suggestion, Callendar.