Additional versions

6.3.9600.16384 (winblue_rtm.130821-1623)	4.76%
6.3.9600.16384 (winblue_rtm.130821-1623)	0.11%
6.3.9431.0 (winmain_bluemp.130615-1214)	0.30%
6.3.9431.0 (winmain_bluemp.130615-1214)	0.03%
6.2.9200.16384 (win8_rtm.120725-1247)	2.67%
6.2.9200.16384 (win8_rtm.120725-1247)	12.52%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.05%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.05%
6.2.8250.0 (winmain_win8beta.120217-1520)	0.03%
6.2.8102.0 (winmain_win8m3.110823-1455)	0.05%
6.1.7600.16385 (win7_rtm.090713-1255)	18.39%
6.1.7600.16385 (win7_rtm.090713-1255)	32.98%
6.1.7600.16385 (win7_rtm.090713-1255)	0.03%
6.1.7600.16384 (win7_rtm.090710-1945)	0.03%
6.0.6000.16386 (vista_rtm.061101-2205)	5.71%
6.0.6000.16386 (vista_rtm.061101-2205)	0.84%
5.2.3790.3959 (srv03_sp2_rtm.070216-1710)	0.03%
5.2.3790.3959 (srv03_sp2_rtm.070216-1710)	0.05%
5.1.2600.5512 (xpsp.080413-2108)	14.12%
5.1.2600.5512 (xpsp.080413-2108)	0.95%
5.1.2600.5512 (xpsp.080413-2108)	0.68%
5.1.2600.5512 (xpsp.080413-2108)	0.08%
5.1.2600.5512 (xpsp.080413-2108)	0.65%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
View more
5.1.2600.5512 (xpsp.080413-2108)	0.46%
5.1.2600.5512 (xpsp.080413-2108)	0.08%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.16%
5.1.2600.5512 (xpsp.080413-2108)	0.30%
5.1.2600.5512 (xpsp.080413-2108)	0.33%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.08%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.5512 (xpsp.080413-2108)	0.03%
5.1.2600.3311 (xpsp.080212-0003)	0.08%
5.1.2600.3300 (xpsp.080125-2027)	0.03%
5.1.2600.3244 (xpsp.071030-1534)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	2.86%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.08%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.03%

This is a Windows system installed file with Windows File Protection (WFP) enabled.

The COM Surrogate is a fancy name for Sacrificial process for a COM object that is run outside of the process that requested it. Explorer uses the COM Surrogate when extracting thumbnails, for example. If you go to a folder with thumbnails enabled, Explorer will fire off a COM Surrogate and use it to compute the thumbnails for the documents in the folder. It does this because Explorer has learned not to trust thumbnail extractors; they have a poor track record for stability.

dllhost.exe runs as a service under the name Aplikacja systemowa modelu COM+ (COMSysApp) within the local user context. The file is digitally signed by Microsoft Corporation. .