<s>
Sandboxie	B-Application
is	O
an	O
open-source	B-Application
OS-level	B-Application
virtualization	I-Application
solution	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
This	O
virtual	O
environment	O
allows	O
for	O
controlled	B-Operating_System
testing	I-Operating_System
of	O
untrusted	O
programs	O
and	O
web	O
surfing	O
.	O
</s>
<s>
After	O
various	O
ownership	O
transitions	O
(	O
Sophos	O
acquired	O
Invincea	O
which	O
acquired	O
Sandboxie	B-Application
from	O
the	O
original	O
author	O
,	O
Ronen	O
Tzur	O
)	O
,	O
Sophos	O
eventually	O
dropped	O
support	O
and	O
released	O
the	O
code	O
as	O
open-source	B-Application
.	O
</s>
<s>
The	O
day	O
after	O
the	O
Sophos	O
announcement	O
,	O
a	O
third-party	O
developer	O
known	O
as	O
David	O
Xanatos	O
forked	O
the	O
open-source	B-Application
project	O
and	O
expanded	O
it	O
later	O
with	O
Sandboxie	B-Application
Plus	I-Application
.	O
</s>
<s>
Sandboxie	B-Application
was	O
initially	O
released	O
in	O
2004	O
as	O
a	O
tool	O
for	O
sandboxing	O
Internet	B-Application
Explorer	I-Application
.	O
</s>
<s>
In	O
December	O
2013	O
,	O
Invincea	O
announced	O
the	O
acquisition	O
of	O
Sandboxie	B-Application
.	O
</s>
<s>
Invincea	O
posted	O
an	O
assurance	O
in	O
Sandboxie	B-Application
's	O
website	O
that	O
for	O
the	O
time	O
being	O
Sandboxie	B-Application
's	O
development	O
and	O
support	O
would	O
continue	O
as	O
normal	O
.	O
</s>
<s>
Version	O
4.02	O
introduced	O
support	O
for	O
Windows	O
64-bit	O
with	O
the	O
exception	O
of	O
Windows	B-Operating_System
XP	I-Operating_System
Professional	I-Operating_System
x64	I-Operating_System
Edition	I-Operating_System
,	O
which	O
was	O
never	O
supported	O
.	O
</s>
<s>
In	O
September	O
2019	O
,	O
Sandboxie	B-Application
version	O
5.31.4	O
was	O
released	O
under	O
a	O
freeware	O
license	O
"	O
with	O
plans	O
to	O
transition	O
it	O
to	O
an	O
open	O
source	O
tool	O
"	O
.	O
</s>
<s>
Between	O
May	O
and	O
September	O
2019	O
(	O
when	O
Sandboxie	B-Application
became	O
freeware	O
)	O
,	O
the	O
purchase	O
options	O
were	O
still	O
missing	O
.	O
</s>
<s>
In	O
response	O
to	O
the	O
announcement	O
of	O
the	O
closure	O
of	O
the	O
Sandboxie	B-Application
website	O
,	O
software	O
developer	O
David	O
Berdik	O
scraped	O
the	O
site	O
's	O
contents	O
and	O
published	O
the	O
archive	O
on	O
GitHub	B-Application
on	O
May	O
10	O
,	O
2020	O
.	O
</s>
<s>
In	O
April	O
2020	O
,	O
Sophos	O
released	O
the	O
source	O
code	O
(	O
as	O
the	O
source	O
code-only	O
version	O
5.40	O
)	O
under	O
the	O
GPL	B-License
3.0	I-License
+	I-License
license	O
.	O
</s>
<s>
Sophos	O
stated	O
that	O
they	O
would	O
no	O
longer	O
be	O
involved	O
in	O
the	O
development	O
of	O
Sandboxie	B-Application
and	O
that	O
the	O
open-source	B-Application
community	O
would	O
have	O
to	O
continue	O
development	O
instead	O
.	O
</s>
<s>
Sandboxie	B-Application
Plus	I-Application
is	O
a	O
fork	B-Application
of	O
the	O
original	O
product	O
.	O
</s>
<s>
Sandboxie	B-Application
Plus	I-Application
includes	O
numerous	O
improvements	O
:	O
</s>
<s>
While	O
Sandboxie	B-Application
Plus	I-Application
remains	O
free	O
to	O
use	O
for	O
personal	O
use	O
,	O
a	O
few	O
of	O
the	O
newly	O
developed	O
features	O
are	O
only	O
available	O
to	O
project	O
supporters	O
with	O
a	O
valid	O
"	O
supporter	O
certificate	O
"	O
.	O
</s>
<s>
Until	O
version	O
0.4.5	O
,	O
antivirus	B-Application
software	I-Application
,	O
including	O
Microsoft	B-Application
Defender	I-Application
Antivirus	I-Application
,	O
falsely	O
flagged	O
Sandboxie	B-Application
Plus	I-Application
.	O
</s>
<s>
To	O
clear	O
this	O
false	O
flag	O
,	O
the	O
Sandboxie	B-Application
Plus	I-Application
developer	O
had	O
to	O
pay	O
Microsoft	O
for	O
a	O
digital	O
certificate	O
,	O
which	O
he	O
raised	O
thanks	O
to	O
donors	O
on	O
Patreon	O
.	O
</s>
<s>
Version	O
0.5.0	O
was	O
the	O
first	O
digitally	O
signed	O
version	O
of	O
Sandboxie	B-Application
Plus	I-Application
.	O
</s>
<s>
Sandboxie	B-Application
was	O
included	O
in	O
Brothersoft	O
's	O
2010	O
Editors	O
Pick	O
list	O
.	O
</s>
<s>
In	O
November	O
2011	O
,	O
Gizmo	O
's	O
Freeware	O
gave	O
Sandboxie	B-Application
a	O
rating	O
of	O
9	O
out	O
of	O
10	O
stars	O
and	O
included	O
it	O
in	O
their	O
Editors	O
 '	O
Choice	O
List	O
as	O
the	O
"	O
Best	O
Free	O
Browser	O
Protection	O
Utility	O
"	O
.	O
</s>
<s>
Softonic	B-Application
has	O
given	O
Sandboxie	B-Application
a	O
rating	O
of	O
8	O
out	O
of	O
10	O
with	O
Elena	O
Santos	O
stating	O
in	O
her	O
review	O
that	O
"	O
Sandboxie	B-Application
is	O
a	O
handy	O
tool	O
to	O
test	O
untrustworthy	O
software	O
without	O
putting	O
your	O
system	O
in	O
danger.	O
"	O
</s>
